Question

where is the oort cloud located?
in the innermost region of the solar system, closest to the sun
in the outermost region of the solar system, beyond neptune
in the region between the kuiper belt and the scattered disk
in the region beyond neptune, but closer to the sun than the kuiper belt

Explanation:

The Oort cloud is a hypothesized spherical cloud of predominantly icy planetesimals that is believed to be the source of long - period comets. It is located in the outermost region of the solar system, far beyond Neptune. The innermost region of the solar system (closest to the Sun) is where the terrestrial planets are. The region between the Kuiper belt and the scattered disk is not the location of the Oort cloud. Also, the Kuiper belt is much closer to the Sun than the Oort cloud.

Answer:

In the outermost region of the solar system, beyond Neptune.